Hillside Oil Heating & Cooling Employee Directory

Oil and GasDelaware, United States2-10 Employees

Hillside Oil Heating & Cooling is a family-owned operation in the oil and gas sector, based in Newark, Delaware, and serving New Castle County, DE and Cecil County, MD with a locally rooted approach. With more than 65 years in business, the company emphasizes direct customer contact and responsive service, avoiding corporate call centers. It provides oil delivery for homes and businesses, including a top-loading rack system that enables resale of diesel fuels and heating oil at market prices. 

In addition to fuel delivery, Hillside installs, maintains, and repairs heating and air conditioning systems for oil, natural gas, propane, and electric heat, as well as central air conditioning and ductless options, humidifiers, humidification, and air cleaners. The firm presents itself as a local provider focused on year-round comfort for households and small businesses in the region. In 2025 the company launched Fuel Ox Star Plus, a fuel additive intended to improve fuel system efficiency and reduce winter-related service calls.

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